Ocean Reef PVC HoodIntegral PVC Hood Option Add a PVC hood to your SGE mask. The over hood shroud covers the head, shoulders & upper chest; unlike other over hoods, there are no gaps between the face piece & hood. This is because the over hood is permanently connected between the polycarbonate visor & facial gasket, which eliminates the possibility of user error & contaminates passing through the seal around the mask. This design leaves the head harness outside the hood